SB2026092496 - Use-after-free in Linux kernel thunderbolt driver
Published: September 24, 2026
Security Bulletin ID
SB2026092496
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-97509)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to improper reference counting in the Thunderbolt XDomain service lifetime handling when releasing an XDomain service. A local user can trigger service release after the parent XDomain is released to cause a denial of service.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/8ab12d015884b8aa85ea7ed58c5a0bae4264fe60
- https://git.kernel.org/stable/c/8b4060998637f06975fceee9b73845d8672d411e
- https://git.kernel.org/stable/c/a4567e5380e4e46d0ea9a28d2d675e5c6f013d54
- https://git.kernel.org/stable/c/daeaa6c7211d03ed061b0dd22a875fad9372b090
- https://git.kernel.org/stable/c/ea60ae6233ca0fc0d414e9c11f0d86c63b303fc7